I've been trying to find the name of this show for YEARS. I watched it every day when I was young (around 10 years ago now). I'm pretty sure it was on Channel 5 (for all you English people) in the early morning since I would watch it before school.
All I can remember is that there was a group of kids and they'd travel to different places (maybe times too?) and would have to capture some kind of monster (similar to Pokemon/Digimon) that was causing havoc. Each monster I believe was recaptured in an egg (each egg was also unique) and there was usually just one per episode. There may have been some kind of scientist involved with a machine that sent them to these places? But my memories may just be getting confused with Pokemon at that point. I know it wasn't Monster Rancher as I've had suggested by friends but beyond that I've no clue.
Any ideas? I really loved it and it would be amazing to rediscover it after all these years.