Marvel vs Capcom 2/Servbot
Servbot, Tron Bonne's assistant, is garbage tier in this game. His moves typically do little to no damage, However, he's incredibly hard to hit, tough to combo, and his Y super does amazing chip damage.
When Servbot dies, he explodes and leaves life-up crystals behind for your opponent.
First row: LP, HP, A1. Second row: LK, HK, A2.
Kobun's damage is high enough that most people never use him as an assist and thus just pick "Y" type for the generally superior version of Lunch Rush.
Generally the easiest way to win with him is to pair him with Tron-Y or Doom-B. Build meter, attempt assist-based cross-ups, and unleash the huge chip damage of Y-type Lunch Rush whenever you feel like it. You can superjump and use the air Kobun Fire to build a little meter while they chase you.
Most people pick him as a joke. He's hard to hit, so they'll taunt and run away just to troll you. To actually win with him, rush them down. He's so quick and small that if you pair him with a good assist you're going to get on top of them pretty easy. His combos do almost no damage, so just set up your assist to punish for you while you build meter to chip them with.