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Actually both are rather Bulky.
78/78/115 for MCharizard Y and 78/111/85 for MCharizard X
MZardyY can try a stall set with Will-o-Wisp patching its lower defense and keeping itself alive with Roost. Guts users are mostly weak to Air Slash so they can try to switch-in so safely.
A dedicated Set for MCharizard X, can be directly a physical wall or a heavy hitter tank.