Pokemon Name: Pikachu
Role: Offensive Pivot
Stat Changes (If Any): 25 / 65 / 40 / 45 / 50 / 135 (360 BST, -10 HP, +10 Atk, -5 SpA, +45 Spe)
G-Max Stat Changes: 55 / 75 / 50 / 65 / 60 / 105 (410 BST, +30 HP, +10 Atk, +10 Def, +20 SpA, +10 SpD, -30 Spe)
Movepool Changes (If Any): No incompatabilities, -Extreme Speed, -Nasty Plot
G-Max Move Effects: Ignores all abilities. Pokemon immune to Electric due to type are now 1* effective.
G Max move drawbacks: 33% Recoil
What sets this Pokemon apart from ones with similar roles?: Normal Pikachu is now usable as a frail, powerful Volt Switcher. Jolteon is stronger, able to use (Choice) Items, and is bulkier. Pikachu also likes being able to use physical attacks, but Volt Switch is special. Pikachu's coverage options are also mostly special - while it has coverage (over Jolteon), it doesn't like the limited power. Volt Tackle and G-Max Volt Crash cause recoil, limiting Pikachu's longetivity.
G-Max Pikachu is bulky enough not to get picked on by Priority and can smash through a Pikachu check. But even with the buffs, Pikachu is prone to being revenged by faster threats (especially after Recoil). Its still fast enough that it can clean bulkier teams, after revengers are removed.
Dynamax PIkachu is much faster than G-Max, allowing Pikachu to (potentially) survive a stray priority hit. Setting up E-Terrain is also stronger than G-Max's attack buffs.