Kouji

Len is a character of the day who appeared in Stage Fight!.

Len was a member of the Pokémon Showboat Crew along with Roger, Kay, and Anne. His main role in the Pokémon show was voicing Machoke. When Team Rocket boarded their boat and held their Pokémon captive, he helped trick Team Rocket into believing all of the Pokémon knew how to talk.

(Source: Bulbapedia)