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I have one just as you mentioned OP, he is really fun but not the scariest of Megas.
His subpar speed puts him in an akward spot, not quite slow enough to fully utilize trick room.
Another interesting factor to consider is, is Dragon Pulse worth keeping just because of Megalauncher?
The correct answer is to drop it for Icebeam for more direct coverage, plus most dragons are 2X weak to Ice anyways.