1º - serperior was my starter and I just took him out of my team once, for the Global Link championship. Musharna was my third pokemon, I captured her just after i rescued munna and musharna in the dreamyard.
2º - they are my capture team, that means, I always capture a pokemon with them, using serperior leech seed and musharna hypnosis.
Breloom always has a space in my party no matter what. It's hands down my favorite pokemon :3 It was one of the first pokemon that I caught during my first run through of Ruby the year that it came out (I was in like 3rd or 4th grade I think?) but yeah. The reason being? The name Shroomish. I laughed so hard when I saw that. Cuz my grandpa and I used to go out picking the not-drug mushrooms that grow around the woods in here that he fries up sometimes. and when we'd find one he'd say to yell shroom! So that made me think of that so I caught it and kept it on my team. I really didn't care that I already had a grass type on the team (treeko) and it worked well. I actually still have that first female breloom of mine throughout the generations :'D Though I have made a few other alternates lol.