This is a sequel to Hamtaro!Yes. Hamtaro has eventually learned to speak. And YES! Laura's all grown up. Into a loser she is in this show. And visited a Nickname-Rater the moment Hamtaro became less lovable due to its voice. You're welcome.
- Ebichu appears to be a girl hamster while Hamtaro appears to be a boy hamster. Maybe Laura finding out "he" was a "she" is what required the name change?