Items can't be transferred from GenIV.
Well that's dumb, but good to know.
I don't think Accelgor is that bad, but it is extremely frail. It also can't make up for that in a significant way- it can't set up hazards like Aerodactyl,
It gets Spikes by breeding with Crustle I think, but I know it gets them. It's naturally faster than a max speed Aerodactyl too, needing only 136EV's on a +Spd nature to outspeed all +Spd nature, base 130's, which isn't anything to scoff at if you ask me.
Also access to Extreme Risk off of it's top HP of 364 lets it come in on most things and just straight up kill them 100% of the time, hence the viability of the Scarf set to deal with the extremely powerful Butterfly Dance, and the still good Dragon Dance sweepers.
Overall Accelgor has a lot of viability this gen as a lead or dedicated Risk killer for a team as the other users of Extreme Risk(besides Victini) are weaker(in HP) or slower than it. Even coming in on Rocks lets it kill off weakened Pokemon of up to 273HP.
Yeah but he doesn't get taunt. Aerodactyls best utility was/is taunting enemy taunters/leads, and then getting the stealth rock down... while Accelgor cant taunt and might get only one layer of spikes down before hes taunted instead.
I can see how this would be considered a weakness, but setting up 3 layers of spikes against conventional leads is great. Obviously I'm talking about 1st layer on their Rocks, 2nd on their first attack and 3rd on their killing you. If they switch after Rocks you can get the 2nd layer for free and Risk their switch in for being dumb.
I dont think thats a big deal though. I think Accelgor is great as a lead/scout. Coming in and out of battle to lay spikes and U-Turn around, with the addition of death gambit to counter opposing dangerous threats... I think its worth it for sure.
I see this as his main usage tbh, and he'll do it better than a lot of Pokemon providing that hazards aren't up.