I restarted my games quite a bit during my teenage years - I'm a chronic planner and I constantly had new ideas for teams across all my games, but I'd never finish the story! I'd get to the mid-game slog and just... restart, seemed like I got more joy out of planning than I did playing. It unfortunately led to me restarting my Pearl file which had 300+ hours in, a HeartGold file which featured my most iconic Johto team, and a White file where I cleared everything up to Alder (which also held a bunch of Pokemon I transferred from my Gen III / Gen IV games). I regret that a lot, but what's done is done.