Here it is, another original design for a pokémon with unique typing.

Bug/Ice is kinda a really weak typing. To compensate that, Pupice and Iceros ability is 'Permafrost', due to being made of unbreakable ice, they are immune to all of the ice weaknesses. Might sound kinda OP, so many immunities, but still is weak to flying and poison (due to being bug), and the attacks can still be not very effective.

Larvice: Larvice is a very fragile pokémon. Lives in snowy habitats, since it has not many predators for bugs and allows easy camouflage.

Pupice: To prepare for its final evolution, Larvice becomes Pupice, a very protective form made from ice that can only be broken from the inside.

Iceros: A massive beetle pokémon with a carapace made of unbreakable ice. They use to live in coniferous forests and protect them.