Many people are gonna tell you to power it up right away "lol it's a lapras..." etc.
But I would wait for 3 reasons.
1) You dont have enough candies to power him up to max so put him as buddy and wait
2) Blizzard is the worst of the 3 charged moves for defense by far, trust me (Ice shard Loklhass is made to be a defender not attacker)
Icebeam>DragonPulse>>Blizzard
3) IV is a bit low even though acceptable