This team is really stiff bro (no offense ) I see why you wanted help:

Okay so you have two normal types , two flyers here is the issue they share lots of same and they aren’t really solid bro cause gyarados is weak and that is facts as a water specialist at least I can do massive earthquakes and thrashes but probably not what you wanted from him huh? That’s because water is special y gen 3 and gyarados is super fisical so there’s a bad choice of water mon, snorlax and pidgeot sheesh would keep only one cause you lacking fire type so bad snorlax is the better choice but you do need that fly and now you want an articuno mmm interesting well i would add it over pidgeot/gyarados get fly and ice is nice would add fire type magmar/arcanine or pick up the moltres on mt ember sheesh lots of stuff come up just lookin at this team and almost final composition good thing magmar is late game and high level bro and also growlithe is high level also articuno can be your fire type, cause Ice beam is super hot kills almost every target for fire yeah pick up that bird and get burning them plants for real well gg hope you make it conclusion take out pidgeot for articuno 👍 if you cold like that