1. Forgot he wore it at the mixed bath.
2. It's just that Sanji's not the training type like Luffy and Zoro are, so it's hard to know whether his Onigashima key could just be considered everything after his Page One fight.
2.5. I mean, it's just that it could include stuff after his second use of the Raid suit (since he uses it for the 2nd time in the bath basically right after the first time).
2. It's just that Sanji's not the training type like Luffy and Zoro are, so it's hard to know whether his Onigashima key could just be considered everything after his Page One fight.
2.5. I mean, it's just that it could include stuff after his second use of the Raid suit (since he uses it for the 2nd time in the bath basically right after the first time).
If you're implying it activated after he wore the raid suit the first time then idk if anything supports that, and characters not shown training despite becoming stronger isn't really a justification as that's been the case throughout the series.