Ok, as courtesy to Raichu himself, Im starting from scratch.
B: "Raichu, Show 'em a REAL Thundabolt. Shut it DOWN!": Raichu's signature move, Raichu absorbs electricity yelling, "Raiiiii," for 4 seconds, then unleashes it in a startling blast of electricity while screaming, "CHU!". While charging, Raichu loses all motor functions. This move can be cancelled by pressing the Guard button. Can only be used when charged the full length of time, then a bolt of lightning flashes at lightning speed at any given direction, via the control stick. The lightning blast goes through everything, and can hit multiple enemies if in the same direction. The bolt deals 50% damage plus massive knockback to whomever is hit. Raichu also takes 10% damage.
Side B: Volt Tackle: Raichu charges energy, then rolls forward with an electric spin, almost the same motion and speed as Sonics Side B. Can be cancelled by pressing any button. If Volt Tackle hits at minimal charge, it deals 10% damage to those hit and good knockback, Raichu also takes 3% damage. If hit at max charge time, maximum charge of 3 seconds, Raichu moves much faster and deals 24% damage, great knockback, and Raichu takes 8% damage himself.
Down B: Thunderstorm: Raichu plants his feet on the ground, and charges his power. While doing this, every .8 seconds, a small lightning bolt will shoot from Raichu in a random direction, usually towards his enemies. If they strike an enemy, they take 7% damage and cause knockback. If they hit, Raichu ceases charging. Also, Raichu can be knocked out of charging by any move. While Raichu is charging, every 2 seconds he heals himself by 5%. This move can only be used to heal a maximum of 20% damage per life. When the max healing is reached, Raichu still sputters electricity until the move is cancelled or he is hit.
Up B: Raichu's arrogance, aka Take Down: Raichu dashes in the given direction via control stick. Raichu travels as far as one of Pikachu's Quick Attacks. If Raichu hits an opponent, they are spiked downwards. Raichu deals 10% damage, and takes 3% damage as a result. Also, if it hits, Raichu then enters "free-fall mode".
Final Smash: "Raichu is da Ultimate Pokamon!": Raichu gains tremendous power. For 8 seconds, Raichu remains vulnerable, but takes no recoil damage from his attacks. Also, all Raichu's moves no longer have to charge.
Hahaha, that is the ULTIMATE Chu. I decided to make Raichu exactly as he is depicted in Lt. Surge episode; a raw fountain of power. I changed all the cruddy stun moves, and changed them to ultimate powerful attacks with drawbacks of course. But if he gets that final smash, your pretty much finished.