Surprising Fusions you've had?

What are some splices you've had with unexpected results?

Me personally I'm leveling the friendship of my Chimecho so I fused it with my Whimsicott to make use of Prankster and Leech Seed.

When I started Eternatus with it at 1250 it was supposed to leech and die, it SOLO'd that guy without a lot of effort. It had 6 soul dews 12 calciums and 10 Spoons so it was pretty buffed to be fair. Plus it lived twice on 1 hp with the focus bands.

That was my most unexpected fusion so far :).