Did you mean: questions I somehow didn't even think about.

We're going to say it's the same as other characters. Magical attacks or abilities will be removed, while ordinary training/physical abilities can stay. Going over its natural learnset, Serperior specifically could keep abilities like Tackle, Leer, Wrap, Slam, Coil, and Wring Out. Those would all be fine. Obviously it's not limited to only using them as attacks -- anything a snake (with clearly above average intelligence) could do, Serperior could do. But magical abilities are gone.