Starting at around 7 min in, we see the player start to test out Saiki's moves. He also shows his command list, which seems to have symbols for what does and does not have EXs, if anyone wants to look through that.
At 8:03, you can see Saiki's EX DM in action. FINAL BRINGER! *ahem*
There might be much more to this vid, but I've only watches some of it, but thought it might be helpful to those who want to see him explored in detail!