fun fact for all who didnt already know it but the boss music and the airhorn sound that play during the fight are literally the noises that groovy long legs makes which is why the music plays only for him if you spawn him in from the piklopedia
Yeah, it's a pretty easy boss, especially if you're used to fighting other Long Legs variants. I threw a Pikmin into the center to see what the gas did out of curiosity when I fought it, so I found out.