To get this achievement you have to play every mini-game. You will play through most of them while doing the main battle achievements for each character. There are all but 6 unlocked when you first start the game, and the others are unlocked by winning a tournament with each of the characters. You can actually get all of these in the online mini-game frenzy mode before the main battle achievements, but that'd be a huge waste of time. I've broken them down as to what games appear on which planets to make it easier to keep track of. Just print this out and mark them off as you clear them & each planet as to not waste time. All 43 games, and the planets they appear. I hope this helps someone.
Amuseth: 6 Games
Cash Clash
Hot Shot
Kaleidoscope Survival
Pinball Battle
Power Supply
Sumo Paint
Blazer: 7 Games
Cool Your Jets
Hop To It
Magma Escape
Magma Rumble
Sumo Clash
Thermal Detonator
Volcanic Panic
Earth: 7 Games
Amoeba Hunting
Conveyor Belt Chaos
Electric Rumble
Judgement Tower
Loader Madness
Robo Battle
Tube Racer
Eternite: 6 Games
Cargo Chaos
Coin Drop
Debris Field Derby
Mystery Laser Rumble
Super Slam Dunk
Tail Blazer
Icicle: 5 Games
Ice Billiards
Ice Breaker
Ice Rumble
Ice Sculpture
Ice Treasure Hunt
Machina: 6 Games
Collision Collusion
Conveyor Smash
Flamethrower Madness
Turbine Coin Collector
Turbine Jumper
Turret Termination
Moisture: 6 Games
Aqua Blast
Aqua Hunter
Don't Sink The Boat
Hopping No Stopping
Over The Falls
Unerwater Rumble