On another topic, I really still think that Regigigas needs testing in UU. That weak recommendation is being way too optimistic for the guy.
I personally just don't see what's too gamebreaking about it being in UU. UU is so much more offense-oriented than OU, and Regigigas isn't going to hurt much with 80 base special attack, especially when it can't raise that in any way. Yeah 110/110/110 defenses are good, but when it's gonna get eaten for lunch, then who cares? It can't recover in ANY way besides Wish support, and all it does is sit there and do Parafusion, and maybe the occasional Knock Off. There's counters for these things though.
Let's see, there's Muk with Sticky Hold, not getting his item Knocked Off, slow enough to not care about Paralysis, and great defenses to not care much about confusion. I'm pretty sure that Regigigas won't be able to break Muk's sub with his crappy special attacks (Thunderbolt/Focus Blast/Hidden Power is whole special movepool).
Focus Punch from Muk to Regigigas --> Annihilated
There's also Limber Hitmonlee who can come in and I'm pretty sure can OHKO with STAB Close Combat while all Regigigas can do is MAYBE try a Zen Headbutt from his crappy attack (wasting a slot), or it can use its baby pool of special moves to hit Hitmonlee's base 110 special defense. No Thunder Wave for Hitmonlee. :]
Close Combat to Regigigas --> Annihilated
Regigigas also gets busted up by Rotom, since it'll inevitably get something bad Tricked onto it, get statused, and really not be able to do much back.
Really, I could go on with even more counters, but in general, strong Fighting attacks spell the end of Regigigas's life since he has no way to recover any HP besides the incredibly weak Drain Punch, and it has no reliable way to stall out the 5 turns without being a bloody mess if it miraculously does, since UU is a lot more offense oriented.
Seriously, this guy might be a good UU, but really, it's going to have a lot of trouble making the team even in UU since it's too much of a hassle to use. It may have a good physical movepool, but that goes off of his crappy attack which he has to attempt to stall 5 turns with. Special and Support movepools are just downright awful. Let's look at its movepool actually:
Physical Movepool
Fire Punch
Ice Punch
Thunderpunch
Superpower
Zen Headbutt
Return
Focus Punch
Brick Break
Stone Edge
Drain Punch
Avalanche
Knock Off
Ok, not bad. Still has to go off Slow Start attack barring a miracle. Knock Off is the only practical move here, maybe Return just for STAB, but it would require a hell of a lot of attack EVs to do any kind of damage though before Slow Start finishes.
Special Movepool
Hidden Power
Hyper Beam
Thunderbolt
Thunder
Focus Blast
Wow. The fact that I had to include Hyper Beam and Hidden Power just to make a possible list is just downright awful.
Support Movepool (only viable stuff)
Confuse Ray
Toxic
Rock Polish (maybe)
Psych Up
Swagger
Substitute
Endure
Yeah, that may look bad already, but it's even worse when you consider that Toxic is learned by everything and Regigigas is rubbish at using it. Rock Polish MIGHT be useful if it can magically get those 5 turns off. Psych Up is kinda useful, Sub and Endure are learned by pretty much everything, and same goes for Swagger. In other words, terrible.
Yeah, so really, does Regigigas deserve BL status?
Seriously, in my opinion, it's an OK UU at most, but sure as hell not BL, since it can be countered incredibly easily, and will get trampled without much difficulty even with great defenses by the offensive metagame of UU. I think it at least deserves to be moved down to UU for testing. But what do you think?