An important rule is that you can put your commander back in the command zone if it would be sent to the graveyard, to your hand, to your library, or into exile
February 17, 2023 OP01-085 Mr type, select 1 of your opponent's Characters with a cost of 4 or less
This matters because abilities that say whenever this creature attacks will not trigger for the tokens
This includes the Test Tube Mewtwo, aka MewTube secret rare, which while having the layout of a regular Pokmon-GX is textured like the other secret rares
In the Kingdom Hearts games they are early game cannon fodder
Xatu attaches the extra energy, you can attach one from hand, and Dynamotor a third from the graveyard