Bandit
Smash Lord
Ahh... the memories... I killed my tamagotchi so many ways...light type seems too predictable - we need unique ones: dairy type - milk, cream, cakes, pastries you name it - effective against normals for making them fat and ineffective against ghosts because they don't eat.
I'm thinking a digital type - like a Facebook Pokemon - FesBok would be it's name. It would rival porygon and its epileptic flashes of death on TV, I think this type would be effective against machines and terrible against water, fire, ice and every hazard that ruined my tamagotchi back in the day.
hmmm... a musical type? - musical instruments that come alive, trumpeeti and pibliano would be the benchmarks - they'd bash others to death with their keys and buttons but they would be weak to jigglypuff's singing.
I'll stop now
I would play Fesbok.