The CD32 was basically a CD equipped Amiga 1200 with the addition of a custom chip, the Akiko, for the so-called "chunky-to-planar" graphics conversion process and to act as the CD controller. I don't see why it wouldn't accept a common Amiga mouse, since the mouse port is also the same.
Being that the CD32 is a console, I'd exclude any light pen/graphics tablet/funky accessory which would require additional drivers. But a mouse would just plug in and play, wouldn't it?
Dunno, am I missing the point here?
KiT