So now I've had the game for a while and I've unlocked and tried out more supports
I still like Cubone and Diglett but there are others I like just as much if not more. Generally I use one support in round 1 that's not as necessary and then save the second mon for round 2 so I get the charge bonus at the end no matter what. (I just use standard Cheer skills). Note I do have more practice against the computer than actual human beings
I gotta start getting online
Frogadier and Eevee: I'll generally use Frogadier in Round 1 but Helping Hand is good either as a boost apart from Burst mode in Round 1 or a way to keep a momentum going before or after Burst mode in Round 2.
Reshiram and Cresselia: Similar but different strategy: I'll use Cresselia in Round 1 to give myself the boost before Burst mode, then take advantage of Reshiram in Round 2 so I can get him fully charged quickly.
LeifEriksson
: Have you tried Electrode to interrupt instead of Magikarp? I tried both but Magikarp never got charged fast enough.