Need help with my Pokémon Team

Hey guys,

I'm new with Pokémon competetive. I like Pokémon since red edition, with age of 12 years.

I created a team, but it won't run very good. Maybe i have to learn more about it (ok, i'm sure about that 😅) or my team is too weak.
Pls rate it and give me some advices to get a better team.

I will be very thankfully.

Here it comes:

Tyranitar

Hard
Weakness Policy
Sandstorm

++Attack ++HP +Def

Earthquake
Stone Edge
Crunch
Ice Punch



Corviknight

Impish
Berry
Mirror Armor

++HP ++Def +Speed

Taunt
Roost
Iron Defense
Brave Bird



Dragapult

Jolly
Choice Band
Infiltrator

++Attack ++Speed +Sp.Def

Dragon Darts
U-Turn
Phantom Force
Sucker Punch




Grimmsnarl

Impish
Light Clay
Prankster

++HP ++Def +Speed

Taunt
Reflector
Light Shield
Dazzling Gleam



Heat-Rotom

Bold
Left-overs
Levitate

++Sp. Attack ++HP +Def

Overheath
Volt Change
Will-O Wisp
Dark Pulse



Gastrodon

Modest
Aussault Vein
Storm Drain

++Sp Attack ++HP +Speed

Earth Power
Scald
Ice Beam
Clear Smog


Thanks guys :)

Would you mind reformatting the team with the standard layout of

Pokemon @item
Ability:
EVs:
Nature Here

- move 1
-move 2
- move 3
- move 4

It'd make it easier to look over your team and give better feedback.

I also need help with my team...

maybe replace grimsnarl's dazzling gleam with spirit break