From Barney Bunch wiki
grandpa, his gay b*tt buddy Gerald, and Helga's father Big Bob. A well known fact is that fellow 4th Grader Helga Pataki was in love with Arnold but knew that he was a flaming f*ggot so she became h*mophobic like everyone else in Hillwood and started harassing him. So Arnold left Hillwood and joined the Barney Bunch after having g*y s*x with fellow Nickelodeon star Drew Pickles. Arnold now has plans to return to Hillwood with his b*tt buddies to turn all of the str*ight h*mophobes gay and get his revenge. Arnold has a swell relationship with his grandpa Phil, and must shove d*ldiss up his *ss every 10 minutes in order to please him.