Newbie 3.5e magic question

[KILLGORE]

There are many ways. Metamagic feats,class options, your caster level, you charisma score and items affecting it etc. If you cast on another creature and they are unwilling, they are allowed a save most of the time. Theres ways to alter that also. For example if u get the metamagic feat heighten spell it increases your caster level therefore making it a bit harder to dispel.

I guess the bigger question is who is constantly dispelling your polymorph? The GM? Might be a reason they dont like it for whatever reason. Dispel magic is not typically cast at a player character because its not typical for an npc to just know that. Thats more for players. It requires a 6th level arcane caster and i can think of better 3rd level spells to mess with you than a dispel...