There are countless cards that can recur creatures or artifacts in Commander, and you can initiate the loop at instant speed in response to removal, if needed
Other cards from the same time period as the Team Rocket set that didnt see an appearance were Owners cards, such as cards that had gym leaders such as Brock and Misty in their name
Nowadays, you can get a vanilla 3/3 for a measly (looking at you Sundial, Dawn Tyrant)
Having this card enter tapped with a stun counter makes sense, since Tonberries are pretty slow to start out a fight
Since you can just bring this Miku, Child of Song, back after she has been killed as per Commander rules, you can make use of its ability again as many times as you like, with the only caveat being a simple increase in mana cost to bring her back each time