Ok, i give you Audino,
but Camerupt was picked for a very obvious reason and Abomasnow was always well received (at least outside of competitive, which is something i'm not talking about here).
But on the other hand you have:
- Charizard, who for some reason needed 2 mega forms and even a gigantamax form
- Pikachu, who got chunkachu
- absol
- mewtwo who also got 2 mega forms
- Tyranitar
- Blaziken (who got a mega way before the other 2 starters from same gen)
- Garchomp
- Lucario
- Scizor
- Gengar
Overall i'm fine with megas and gigantamax (which was mostly gen1 pandering anyway, but without the power push megas did) to not be seen or heard again from.