I wonder how many people are gonna ditch Blaziken for this. My plan is to hopefully build a Typhlosion/Infernape deck after my visit to America next month.
Right, the card. 110HP is average for a Stage 2 in the DP series (but better than Blaziken). Excellent Poké-Power, especially when used with Infernape (like you didn't know that anyway).
I would say this attack is actually better than Blaziken's, even though Blaziken's attack helps its Poké-Power. A lot of people who aren't running Blaziken/Infernape may be wanting to run some sort of Water-type deck to combat the combo, and Typhlosion's attack counters those decks brilliantly. It also does more damage than Fire Stream (Blaziken).
Better Weakness, of course - +30 always better than x2. Retreat cost could be better, but hey, it's Typhlosion. Firestarter gets them back easily.
Quite frankly, run 4 Infernape, 4 Blaziken and 4 Typhlosion and you're laughing.
9/10.