Played a little with debug tricks on the other game...identified that isn't actually Sonic Dragon but Super Taiwanese Baseball League





Sprites are missing/wrong because it uploads a G. Clinton-esque scatter-gather DMA list at e90030, weird because it does:
ff637c src f00010 dst 2f size b900 param

f00010 is the video DMA, and here's the title screen list:



I've told you it was funky, no?