Sonic battle on GBA

ok i realise that ths game is far from new but i have a quick question which i can't find the answer too anywhere.

WARNING: POSSIBLE SPOILERS!

in emerls air power section there are a lot of extra slots underneath everyone's abilities. i presumed these would be like the combo attack in the ground power section but i can't find any information about them anywhere?

anybody now what they are? more info? how to obtain them?

tia

dp