In the Pokemon Clover rom hack, you can find this dying variant of the Regi trio. Let me know if you want lore.

Sorry if I ruined a part of your childhood :/

Regimelt, regirust, and regicrumble

regirode, but that's good too

ye

Lore, please!

Regimelt: A wandering Regice that was exposed to extreme heat, what remains of its near melted body is enforced by what little vitality it has left. It seeks victims to freeze before Draining their visits to restore its own.

regice physically can't melt

Remember that this is not canon

Regirode: A lost Regirock that withstood decades of erosion and weathering, what remains of its stone body is supported by its what little vitality it has left. It wanders aimlessly in a desperate search for victims. It encases its victims in rocky coffins before sapping their vitality to restore its own.

Regirock is always having that happen, it just gets new rocks

Regirust: An abandoned Registeel that suffered ages of rust and corrosion, what remains of its metic body is preserved by what little vitality it has left. A single touch can cause even the mightiest Steel Pokémon to rust and corrode, sapping their vitality in the process to restore its own.

It can't rust

Anyone who has any opposing opinions, just remember that this isn't canon

These pokemon don't refer to their canon counterparts in any way