I dunno. Really shouldn't be a standard move. It doesn't help that it has a small case of 4MSS
But if it works, then sure. I don't mind it staying in S; I'm not taking a side strongly. Just wanted to give some more thought.
What 4MSS? He has 3 moves he has to use and one slot where he could run damn HP Electric if he so desires.
Dragon Pulse is Zard X's most reliable way to get past dragon types, given that they resist his STAB and his most powerful coverage move.
Fire Blast under sun: 110*1.5*1.5=247.5/2=
123 basepower on a resisted hit
Dragon Pulse hits 140 on a SE move.
To give you an idea, that Fire Blast is stronger than Mega Luke's CC.
So, just to show you the raw power on it against the dragons of OU.
252 SpA Mega Charizard Y Fire Blast vs. 4 HP / 0 SpD Multiscale Dragonite in Sun: 78-92 (24 - 28.3%) -- 97.8% chance to 4HKO Okay, not exactly too powerf-oh multiscale. If it's broken...
252 SpA Mega Charizard Y Fire Blast vs. 4 HP / 0 SpD Dragonite in Sun: 156-185 (48.1 - 57%) -- 91.8% chance to 2HKO
252 SpA Mega Charizard Y Fire Blast vs. 4 HP / 0 SpD Latios in Sun: 144-171 (47.6 - 56.6%) -- 86.7% chance to 2HKO
252 SpA Mega Charizard Y Fire Blast vs. 4 HP / 0 SpD Latias in Sun: 126-148 (41.7 - 49%) -- 82.4% chance to 2HKO after Stealth Rock
252 SpA Mega Charizard Y Fire Blast vs. 0 HP / 0 SpD Salamence in Sun: 189-222 (57 - 67%) -- guaranteed 2HKO
252 SpA Mega Charizard Y Fire Blast vs. 4 HP / 0 SpD Garchomp in Sun: 180-212 (50.2 - 59.2%) -- guaranteed 2HKO
252 SpA Mega Charizard Y Fire Blast vs. 4 HP / 0 SpD Mega Garchomp in Sun: 164-193 (45.8 - 53.9%) -- 46.9% chance to 2HKO
Yeah, you get the idea. Dragon Pulse fails to OHKO any of these mons, so it isn't an issue at all. Yes, it fails to OHKO even Salamence. It's not a must-have. Now, I'm not saying it's completely unviable, as it does give him a move that will always hit on them, but that's the beauty of him. He has a last moveslot where he can, and I repeat it, do whatever he wants. Hell, i've run substitute variants to great effect (on a team that got me to top 10 before the ELO hell system started, I used him. I'm really not that great a battler even)
And the final part, the most important note: He is a wallbreaker. He doesn't
need to kill the mons he attacks, only severely damage them so that a teammate can utilize the hole in the opponent's team.