LOL, I honestly based it on the reaction of people when I said I wanted one for competitive battles. :P
Not really sure how to qualify something as underrated, so I just used that as a measure with this one.
What were their reactions? If they said Gale Wings Talonflame was ****, then they don't know how overpowered Gale Wings Talonflame is. It might drop off a bit in usage once new 'mon hype fades, but right now Talonflame is far from underrated.
If you don't believe me, below is Top 10, Talonflame at 3 right behind Aegislash and Greninja, respectively.
Spoiler:
https://www.smogon.com/forums/threa...-simulator-statistics-—-october-2013.3491683/
Total battles: 155571
Avg. weight/team: 0.583
+ ---- + ------------------ + --------- + ------ + ------- + ------ + ------- +
| Rank | Pokemon | Usage % | Raw | % | Real | % |
+ ---- + ------------------ + --------- + ------ + ------- + ------ + ------- +
| 1 | Aegislash | 38.33802% | 111327 | 35.780% | 86226 | 35.268% |
| 2 | Greninja | 28.54731% | 83383 | 26.799% | 65873 | 26.943% |
| 3 | Talonflame | 25.44047% | 67122 | 21.573% | 53276 | 21.791% |
| 4 | Gengar | 20.89680% | 64808 | 20.829% | 48280 | 19.747% |
| 5 | Ferrothorn | 14.84655% | 41785 | 13.430% | 36191 | 14.803% |
| 6 | Tyranitar | 14.71539% | 42299 | 13.595% | 34962 | 14.300% |
| 7 | Scizor | 14.63622% | 42142 | 13.544% | 32492 | 13.290% |
| 8 | Klefki | 13.76588% | 37730 | 12.126% | 33505 | 13.704% |
| 9 | Garchomp | 13.65784% | 41484 | 13.333% | 31284 | 12.796% |
| 10 | Goodra | 12.69665% | 37345 | 12.003% | 28246 | 11.553% |