How do beat mandarin and ultimo mark 3 i've been stuck on it for ages!..

Fly over the lighted transporter, until a spider crawls on the transporter. It will transport the spider and ultimo into Mandarin's balcony and blow up ultimo. Then use the transporter to enter the balcony and attack Mandarin until he moves to another balcony. Repeat.

It is easy jusy beat them up

Fly over the light thingy that transports you, but make sure you don't transport yourself, and when a spider crawls on it it will transport and ultimo will too, therefor, you go in and hit him until he moves to another balcony thing, and repeat until mandarin is defeated. Hope I helped. My answer was similar to someone else so I understand if this doesnt make an impact.

You people don't help because it doesnt work when the computer characters destroy the spiders before they come close to the transporter

I don't know if this will help but for people who don't think it will work this is what I did. I let my teamates fight ultimo but while they were doing that I flew over the teleport and let bugs destroy ultimo and repeated until the mandirin died

Use the fly bois and do a big fly