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

Sandslash
Sandslash 		Base
stats		 Stats Effort Stats Effort Stats Effort Stats Effort Stats Effort Possible genes (IVs)
Level Level Level Level Level
HP 75
65–71
67–74
70–77
72–80
77–85
17
Attack 100
49–55
51–58
53–60
55–62
59–67
27
Defense 110
53–60
55–62
57–65
60–67
64–72
29
Special Attack 45
24–31
25–32
26–34
27–35
29–37
26
Special Defense 55
29–36
30–37
31–38
32–40
34–43
17
Speed 65
33–40
34–42
36–43
37–45
40–48
5

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

This Sandslash's Hidden Power inflicts Electric damage, with 41 power.

And for your copy/pasting pleasure:

17 HP; 27/29 Physical; 26/17 Special; 5 Speed

or start over