Adding to the cheers I know, for ideas:
2530
(Announcer) Team 15... 20...
(Team) 25! 30!
2175/2169
21! (Number here)!
3883
38!83! Who are we? Data bits! Data bits! Who are we? 38!83!
(It's funny because paldrinomes).
I think just chanting the team numbers will always work.
