Here's the Selection Thing
The one with the guy's picture changes the monster's power to allow him to have powerful fists.
The one with the house allows him to shoot a fire atttack.
The one that looks like water allows him to shoot water.
Now as for the remaining 3 which are on the top of his Roulette, 1 is a Bomb which just acts as an exxplosion.
The other acts like electricity which gets added to his fists for power.
Bopp-a-roo
Bopp-a-roo and Zurgane aboard lair
Fura and Wendiu and here's her Sword  
Crimson with Staff in Axe Mode
Thunderstorm Cannon
Here's Motodrone with Cloak
Motodrone