Mega Serperior Mod Notes

• Introduces a Mega Evolution for Serperior that shifts it to Grass/Dragon typing with boosted offensive speed-focused stats (75/110/115/130/100/135), a taller hitbox, and a custom Pokédex line. The form is injected at data reload and is available on both data- and code-driven reloads.
• Mega evolutions in battle hook into Cobblemon's MEGA_EVOLUTION event: when Serperior mega evolves its forced aspects gain mega, its form is swapped to the injected Mega data, and battle clients are updated so the stat/typing changes take effect immediately.
• Species feature assignment marks Serperior as supporting the mega_evolution species feature, allowing the Mega gimmick option alongside the standard Cobblemon key stone flow.
• Added resolver variants for the mega aspect so Mega Serperior reuses Cobblemon's existing Serperior model/poser and shiny/base textures, plus an English Pokédex entry for the new form.
• No custom mega stone item is added; the form assumes the existing Cobblemon mega evolution trigger. Visuals reuse standard Serperior assets, so consider adding bespoke textures/models later if you want distinct Mega presentation.