WHIRLWIND EXPLANATION: Pokémon have a fixed, permanent score from 0 to 31 for each stat that affects how good that stat can ever get.

This calculator will figure out that score (called a "gene" or, more obtusely, an "IV") for you, so you can discard the unworthy. It's more accurate for higher-level Pokémon, so it's helpful to go into a level 100 wifi battle with someone and check your Pokémon's stats from there.

Stat calculator

Dewgong
Dewgong 		Base
stats		 Stats Effort Stats Effort Stats Effort Stats Effort Possible genes (IVs)
Level Level Level Level
HP 90
105–115
108–118
110–121
113–125
2
Attack 70
52–63
54–64
55–66
56–68
23
Defense 80
59–69
61–71
62–73
64–75
18
Special Attack 70
52–63
54–64
55–66
56–68
30
Special Defense 95
69–80
71–82
73–84
75–86
21
Speed 70
52–63
54–64
55–66
56–68
23

Congratulations, you've narrowed your Pokémon's stats down exactly!

This Dewgong's Hidden Power inflicts Grass damage, with 49 power.

And for your copy/pasting pleasure:

2 HP; 23/18 Physical; 30/21 Special; 23 Speed

or start over