Editing Pikachu (SSBU)

At the end of ''SSB4''{{'}}s metagame, Pikachu was considered a high tier character (ranked 15th out of 55 characters). In its transition to ''Ultimate'', Pikachu has been heavily buffed. All of its moveset's aspects were greatly improved during its transition, in addition to its moveset benefiting noticeably from the changes to gameplay mechanics.

Pikachu's largest buffs arguably come from its improved speed: its already above-average mobility has been increased, many of its moves have less ending lag, and its aerials have drastically reduced landing lag; while the former and latter buffs are shared with the rest of the cast, they especially benefit Pikachu, the former due to its small size and the latter since its aerials had among the highest landing lag in ''SSB4''. These buffs improve Pikachu's neutral game and overall comboing capabilities plus, due to its "pancaking" during many of their landing animations, allow it to avoid mistimed attacks with more ease and retaliate. To further complement this, its already great air game was enhanced as well: Pikachu has a new [[neutral aerial]] that acts similarly to {{SSBU|Mewtwo}}'s own and has much more combo potential; both its [[forward aerial|forward]] and [[up aerial]]s have increased KO power, alleviating one of Pikachu's biggest weaknesses in ''SSB4''; its [[back aerial]] [[auto-cancel]]s from a short hop, now consistently launches opponents behind Pikachu, and has a faster animation, which gives it combo potential into itself several times at low percentages, to the point that it is able to perform a pseudo-[[Wall of Pain]] with the move; and its [[down aerial]] now has a clean hitbox that [[meteor smash]]es opponents, further improving Pikachu's aerial KOing ability.

Although not as buffed as its aerial game, Pikachu's other moves have also seen noteworthy improvements. In particular, its [[dash attack]] has increased KO power and significantly increased [[shieldstun]], to the point it is now unpunishable on shield. Its [[forward smash]] has increased range, making it a more dangerous tool for trapping opponents on the [[edge]]; its [[up smash]]'s strong hit lasts longer, making it more reliable for KOing; and its [[down smash]] will always send opponents in the direction Pikachu faces and at a lower angle, making it more useful, as well as gaining a KO confirm into it from Pikachu's new neutral aerial. Pikachu's standing grab extends farther; its [[down throw]] now inflicts additional hit lag on the opponent on release, improving its combo ability; and its [[up throw]] has increased knockback, allowing it to KO at high percentages. On top of this, some of its special moves were significantly buffed, as [[Thunder Jolt]] has less ending lag, which improves Pikachu's neutral game and grants it a trapping option if opponents shield it from far away; [[Skull Bash]] has drastically reduced ending lag on hit, making it much safer unless it is [[perfect shield]]ed; and [[Thunder]]'s cloud hitbox deals set knockback, allowing it to connect consistently into the discharge, which also inflicts much more knockback.

In spite of mostly receiving drastic buffs, Pikachu is not without a few nerfs. The most significant nerf Pikachu has received is the removal of [[Quick Attack cancel]]ing, which noticeably reduces its mobility and approach options, making it more predictable. The changes to neutral aerial, in lieu of an improved combo game, also remove its KO potential. The increased startup and ending lag on its grabs, and dash grab and pivot grab not reaching as far, limit the benefits its grab game has received. Lastly, up throw's altered knockback, while giving it KO potential, makes it more difficult for Pikachu to combo into Thunder. Outside of these nerfs, however, other nerfs Pikachu received have generally been minor, while a good amount of the buffs it received make up for said shortcomings, most notably its improved neutral game.

In the end, Pikachu's entire moveset has seen drastic improvements all around, it benefits significantly from the new engine, and its limited KOing ability was mostly alleviated, causing its buffs to severely outweigh the nerfs it received. Although Pikachu still suffers from the same weaknesses that plagued it in ''SSB4'', such as short range, poor endurance, and still limited KOing ability, its improved strengths now more than compensate for its shortcomings, arguably cementing it as the most viable threat between its fellow "fragile speedster" brethren, alongside its derivative {{SSBU|Pichu}}. While Pikachu is not as common as some other top- or high-tier characters, it has still received strong results in competitive play, courtesy of players like {{Sm|ESAM}} and {{Sm|Captain L}}. This has led to a very strikingly positive reception of Pikachu, with many top players describing it as a top 5 character in the game, with some going as far as considering it the single best character, although this is debatable as its results are not as strong as other top-tier contenders. Regardless, Pikachu is considered much better than in ''SSB4'', and has fared significantly better overall than in previous games (bar [[Pikachu (SSB)|its appearance]] in ''[[SSB]]'').