Oh yes, give Stantler a prevolution. It's not like it's a crappy Pokemon who would actually benefit more from an evolution. Here's my top 10 of Pokemon that desperately need baby forms:
1: Farfetch'd 2: Delibird 3: Luvdisc 4: Basculin 5: Mawile 6: Basculin. Yes, he should get 2 babies cuz he got 2 forms 7: Chingling 8: Basculin. Yes 3 babies because HE THAT GOOD!!!! 9: Dunsparce 10: Spinda
No, actually, the above Pokemon should get evolutions because my Gosh they are absolutely terrible.
It has an evolution. Chimecho.
There's no sense crying over every mistake, you just keep on trying till you run out of cake.