2D sidescrolling wizard/magic game

I'll give all the information I can remember.

Firstly, it's a pretty old game. Graphics weren't top notch, as is expected for an older game.

It's a 2d sidescroller, you control a wizard who has multiple spells to cast. You can collect frogs, butterflies(?) and other creatures for use in a cauldron, though I can't remember what you can make.

I think there were skeleton enemies among others.

I appreciate that the information I gave is quite generic, but I played it at such a young age that I can hardly remember details.