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You really aren't in any position to give advice, still :/
Um, bnlissey has 714 max HP :/:/:/ typhlosion has merely average attack, thunderpunch will only do about 15% to it, TOPS. Heck, you could CB the thing and it wouldn't do jack. bliss can EASILY outstall you and just take 2 or 3 Tpunches, softboiled, and seismic toss you to your not-so-epic defeat. and lol, blisseys run max Def :/
EDIT: I ran some calcs...it takes between 111-131 HP from blissey, out of 714 HP. Yeah, that REALLY hurts it [/sarcasm]
EDIT 2: another calc is in-focus punch does 443-521 damage to max Def and HP blissey :/