Yeah, just figured that out in the rules. Another day, then.

You need to be TL2 for exhibition matches

Oh, never mind, then. Got it, thanks for clarifying.

4 matches max, though you can keep all of them on one board or the other until you complete 5 matches. Do you currently have 4 matches ongoing?

Pokemart:
Battle slots are required to hold a battle. Each battle slot can be used for up to one battle. Trainers have four standard battle slots.
-Where trainers have three battles ongoing, they must have at least one battle on Serebii and at least one battle on UPN.
-Where trainers have more than three battles ongoing, they should have at least two battles on Serebii and at least two battles on UPN.
-Where trainers have two or fewer battles ongoing, they are under no obligation to hold them on a particular forum.
-New trainers don't have to begin following these restrictions until they have completed five battles.