I NEED to defeat my Friend with Flygon

Context: Me and my friend are planning on hosting a cobblemon monotype server where would would basically be gym leaders ( the rules are that pick a type and build a team for that type, No legendaries if you are not an elite 4 member, and you can only pick one pokemon that is not you gym’s main type \[I picked ground He picked poison\] and we will have a full double battle tournament to decide the rankings of the gym leader elite four and the champion( the champion would be the one who wins the tournament ) now we were talking about the type of pokemon we were going to use on our team and what pokemon/ strategies were banned we where talking for a minute then he decided to Put flygon on the ban list ( this was a joke ) i asked him why and he said it was because it was a imposter dragon and lowkey started slandering my boys name. So i thought it would be really funny if the mon he was slandering checked two of his most hyped up mons (Meow with protein choice band knock off triple axel flower trick ( not sure what else) and a assault vested dragalge with draco meteor ) Orignally i wasn’t even planning on running flygon but decided to use him due to the slander i need to make a sand storm team that can take him down ( I know this sound petty and i shouldn’t stoop to his level but Im petty)