How to Train Your Dragon
48 Achievements
12-14h
Invulnerable
Win the final Championship with none of your dragons being KO.
4.4%
How to unlock the Invulnerable achievement in How to Train Your Dragon - Definitive Guide
I had issue with Hiccup as his dragon is very quick and short range, but using the Nagger from range sorted him out.
When I did the Hiccup speed play-through I used this method through the whole tournament, my dragon was only level 15 and I would have gotten this achievement then if I didn't already have it.
As this is now top solution may want to mention that you can exit out of the tournament between each fight to heal dragons and save progress, thanks again
Amazingly enough, I got it pretty much by using the Y-Y-Y combo, over and over. Yep, I mashed the Y button all the way to the end. If you finish a combo and the enemy is dazed, throw off a fire attack (RB) and then immediately start mashing the Y again. You'll be able to do some decent follow-up damage right afterwards.
Good luck!
I used his forward, forward, X or forward, forward, Y to knock the opponent down then used Y,Y,X stun move to keep them stunned for the most part.
If you're still having problems, once you've knocked your opponent down you could keep using Night Fury's Forward, Forward, X or Y move to keep them down. You can run against your opponent and push him in a corner and you'll keep running. Just time it right to push X or Y. Takes longer but works well.
I do recommend, that after every TWO sets of triple-Y combos, you do a dodge to left or right using LT or RT, as this means that when the opposing dragon comes to from his daze, he still has to turn to attack you, which gives you about 0.4 seconds to launch another attack. This time is needed against Astrid's four Deadly Nadder dragons, otherwise she will kick your ass because of the DN's long tail attack.
On my playthrough with Night Fury I leveled him up to 19 and I didn't even bother with the other dragons, I'm doing the tournament right now and I haven't even tried winning with 1 dragon but I've won every fight with only my level 19 Night Fury with (dash X) and (XXXXX), I've gotten 6 perfects and I'm about to fight Snotlout, this is way easier than my first playthrough, hope this helps someone
(MISSABLE) This can be one of the hardest trophies in the game. However, if you follow the following strategies, it shouldn't prove very difficult at all. First, make sure you have the strength and stamina stats for a Deadly Nadder maxed out. It wouldn't hurt to upgrade his speed so that he can do quick dashes as well. Also, you should obviously heal your dragon so that he goes into the tournament with full health. Be sure save before you enter the tournament.
Now, when fighting, you should spam the attack or the plain attack. At this point you should be comfortable with both. (See the road map for more details on these attacks). After each battle, you can exit the tournament and save your progress. Remember to only save if your dragon doesn’t get knocked out. If you do ever get knocked out, just reload the last save file and try again.