On the Moshi Monsters online game, two Moptop Tweenybops have been confirmed.
Zack Binspin is not yet a moshling. It is possible he could be a moshling because Dustbin Beaver is a moshling and they're related. That is because they come from the same species. He is the singer of "Moptop Tweenybop" ("My Hair's Too Long".) The song was actually gong to be sung by Dustbin Beaver, but he was so bad at the recording that Simon Growl had to call for Zack Binspin instead.
Dustbin Beaver's seed is the Trashy Tulip , which can be obtained by subscribing to the Moshi Mag. If you subscribe to the Moshi Mag with your email, the staff will send you an email for the code for 'Trashy Tulip'. Each code is different and only can be used once.