The Best Psychic-Type Pokémon to Use in Pokémon FireRed and LeafGreen
In the original generation of Pokémon games, the Psychic type was widely regarded as the strongest type in the game. Its dominance was not the result of a single factor, but rather several mechanics working in its favor at the same time. Although Ghost-types were intended to have an advantage over Psychic Pokémon, a programming glitch rendered their STAB attacks completely ineffective, leaving Bug as Psychic's only weakness.
In addition, Special Attack and Special Defense were combined into a single Special stat, allowing powerful Psychic-type attackers to not only hit extremely hard, but also tank incoming special attacks. These advantages made using Psychic Pokémon feel like a cheat code.
Recognizing this imbalance, Game Freak made several changes in the following generation. The Ghost-type immunity glitch was corrected, the Special stat was split into separate Special Attack and Special Defense stats, and the Dark and Steel types were introduced to provide additional counters to Psychic Pokémon. Despite these efforts, Psychic Pokémon remain top-tier choices in the Kanto remakes, FireRed and LeafGreen. With plenty of Poison-type and specially frail opponents, your Psychic-type Pokémon will make quick work of anything standing between you and the Pokémon League.
The following Pokémon are the best Psychic-type options to consider for your team.
Alakazam
Alakazam is arguably the best Pokémon available for a standard playthrough. Its incredible base 135 Special Attack and base 120 Speed allow it to outspeed most opponents and KO them before they have a chance to strike back. Few Pokémon can match its combination of offensive power and speed.
One of Alakazam's greatest strengths is that its natural level-up movepool provides nearly everything it needs. Psychic-type attacks are resisted by only a handful of Pokémon in Kanto, and even those that resist them often take significant damage thanks to Alakazam’s massive Special Attack stat. It begins with 
Confusion, upgrades to Psybeam at level 21, and learns its most powerful move, Psychic, at level 36.
Alakazam also gains access to several excellent support moves, including Reflect, 
Recover, and Calm Mind. Calm Mind is especially valuable, boosting both Special Attack and Special Defense in a single turn and allowing Alakazam to quickly set up for a sweep. 
Shock Wave is also worth considering for additional Electric-type coverage, and its perfect accuracy pairs nicely with Calm Mind, preventing potential accuracy drops incurred while setting up from becoming an issue.
Abra can be found early in the game, before earning your second Gym Badge. After clearing Nugget Bridge, head west and then south to the grassy area near the water. Catching Abra can be frustrating because it only knows Teleport, which it will use to flee if not caught immediately. Putting it to sleep greatly improves your chances, but otherwise you may need to catch it with your first 
Poké Ball or search for another.
Once you've caught Abra, teach it the 
Thief TM obtained in Mt. Moon. This will be its only damaging move until it evolves into Kadabra at level 16. 
Thief remains useful for coverage against opposing Psychic-types.
To obtain Alakazam, 
Kadabra must be traded to another game and then traded back. This means you can have a fully evolved Alakazam as early as level 16, which is absurdly powerful for that stage of the game. Even if you don't have access to trading, Kadabra remains an exceptional Pokémon and would still rank among the very best options in the game, which speaks volumes about the strength of this evolutionary line.
Starmie
Exclusive to LeafGreen, 
Starmie is a powerful dual Water/Psychic-type that excels as a fast special attacker. With an impressive base Speed of 115 and a solid base Special Attack of 100, it can outspeed the vast majority of opponents while still hitting incredibly hard. Although it lacks the raw Special Attack of Alakazam, Starmie makes up for it with exceptional type coverage, allowing it to deal super effective damage to a wide range of Pokémon.
Its movepool is highly versatile, but its most effective set typically consists of Psychic and 
Surf, both of which benefit from STAB (Same Type Attack Bonus), alongside 
Ice Beam and Thunderbolt for outstanding coverage. This combination enables Starmie to threaten nearly every Pokémon in the game, making it more than capable of sweeping major battles, including the Elite Four, with minimal support.
The main drawback is its reliance on TM moves. To unlock its full potential, you'll need to spend time at the Celadon Game Corner to obtain Ice Beam and Thunderbolt. Fortunately, Psychic can be obtained from Mr. Psychic in Saffron City, while 
Surf is acquired in the Safari Zone in Fuchsia City. Despite the investment required, few Psychic-types can rival Starmie's blend of Speed, coverage, and overall offensive utility.
You can obtain Starmie by first catching a 
Staryu, which can be found while fishing in Pallet Town, Vermilion City, Cinnabar Island, One Island, Icefall Cave, and Five Island. Once caught, Staryu can be evolved immediately into Starmie using a 
Water Stone, available for purchase at the Celadon City Department Store.
Jynx
Jynx is a unique Ice/Psychic-type that combines powerful special attacks with above-average Speed. While it may not be quite as versatile as Starmie or as overwhelmingly powerful as Alakazam, Jynx carves out its own niche thanks to its excellent offensive typing and impressive base 115 Special Attack. Its Ice typing is particularly valuable in FireRed and LeafGreen, allowing it to easily handle many of the Dragon, Flying, Grass, and Ground-types encountered throughout the game.
Jynx's best moveset typically consists of Psychic and Ice Beam, both of which benefit from STAB and provide excellent neutral coverage against most opponents. It can also make use of Lovely Kiss, one of the most reliable sleep-inducing moves in the game, giving it opportunities to disable threats and set up favorable matchups. Backed by its strong Special Attack stat, Jynx is capable of KOing many Pokémon in a single hit and performs especially well against the Elite Four.
The biggest drawback to using Jynx is its poor physical bulk and numerous weaknesses. Its low Defense means that strong physical attackers can knock it out easily if given the chance. Additionally, obtaining its strongest moves requires some investment, as the Ice Beam TM must be purchased from the Celadon Game Corner, and Psychic must also be taught via TM. Despite these shortcomings, few Pokémon can match Jynx's combination of offensive pressure, utility, and Elite Four performance.
Unlike most Pokémon, Jynx cannot be caught in the wild. Instead, it is obtained through an in-game trade in Cerulean City, where a trainer will exchange a Jynx named Lola for a 
Poliwhirl. Since Poliwhirl can be caught relatively early by fishing with the 
Good Rod, Jynx can be acquired well before the late-game challenges where its powerful Ice and Psychic-type attacks truly shine.
Mr. Mime
Mr. Mime is another Psychic-type Pokémon that excels through utility, Speed, and special attacking power. With a base Special Attack of 100 and a solid base Speed of 90, it can deal decent damage while outspeeding many opponents throughout the game. Although it lacks the raw offensive stats of some of the other Psychic types on this list, Mr. Mime makes up for it with high Special Defense, a unique movepool and several useful support options.
Similar to the Alakazam line, Mr. Mime learns Confusion, Psybeam and Psychic naturally. It also learns Shockwave and Thunderbolt for Electric coverage as well as Calm Mind for setting up. What sets it apart is its access to Substitute and 
Magical Leaf, both learned through leveling up. Substitute allows Mr. Mime to safely scout opponents, avoid status conditions, and create opportunities to attack or set up, while Magical Leaf provides reliable Grass-type coverage that never misses and is particularly useful against the abundant Water, Ground, and Rock-types of Kanto.
Like Jynx, Mr. Mime is also obtained through an in-game trade. On Route 2, a trainer will trade you a Mr. Mime named Marcel in exchange for an Abra. Since Abra can be caught early, this trade allows you to obtain Mr. Mime before the mid-game, giving it plenty of opportunities to become a valuable member of your team.
Verdict
Psychic Pokémon are among the strongest team members you can have in FireRed and LeafGreen thanks to their high Special Attack, excellent Speed, and the lack of reliable counters in FireRed and LeafGreen. The Pokémon listed above represent the best Psychic-type options available, but a few other Pokémon are also worth considering.
Exeggutor is an excellent Psychic-type in its own right, though it tends to fill a different role. Unlike the fast and aggressive sweepers featured above, Exeggutor relies more on its bulk and utility. Outside the sunny weather effect of 
Sunny Day, its low Speed can often leave it moving after the opponent, making it less consistent as a primary Psychic attacker. However, with the right support, it can be a devastating force. For a more detailed breakdown, check out the Grass-type guide in this series.
Gengar, while technically a Ghost/Poison-type, deserves an honorable mention due to its ability to learn the Psychic TM. In practice, it performs many of the same functions as a Psychic-type, easily dispatching Poison and Fighting-types. It also learns Thunderbolt and Giga Drain via TM for coverage and the Hypnosis + Dream Eater combo for utility. Thanks to its Ghost typing, Gengar boasts complete immunities to both Normal and Fighting-type attacks, giving it a unique defensive position that other Pokémon cannot match. If it was a Psychic-type, Gengar would certainly be at the top of this list with Alakazam.
