Maybe FrozenSoilshipping, since the Pokedex says that Larvitar eat soil... But it somehow doesn't fit them...
Going on a tangent from that then... how about naming the pair after a snow-capped mountain? Larvitar is said to live in and eat mountains, then there's the snow/frozen aspect for Cubchoo.
You can have Makalushipping, K2shipping, Manaslushipping, Annapurnashipping... the list goes on!
Like...PolarBearPeakshipping?
Guys, guys, what do you think about Chespin x Fennekin?
Is there an actual name for Cobalion/Virizion if there is can you tell me
I also wonder if there is a name for Chandelure/Mismagius