[DISCUSSION] Calculators are saying that my Haunter is impossible

[Maelstrom]

My Haunter's stats are as follows

Female
Lv. 49
HP: 123
Def: 64
Sp. Atk: 132
Sp. Def: 74
Spd: 124
Hidden Power: Dark
Nature: Timid
Characteristic: Takes plenty of siestas
Best Stat: HP, Can't be Beat
Potential: Outstanding

For some reason all of the calculators I go to say that my stats are impossible for this haunter to even be capable of, can someone help me find out where I can find a good Calculator to help me continue breeding.

Note: This is in ORAS