- Steve, Bob, Joe, Bulbie, and Billy were the only characters Chugga named himself besides Pokemon.
- Chugga said "The Characters I name become viral like.... Him" ( "Him" is Steve).
- Billy was the 5th character that Chugga named besides Pokemon.
- He was first seen is Chapter 2 of SPM.
- Billy is the first character Chuggaaconroy named that isn't a Pikmin or a Pokemon.
- He is also the first character species Chugga named that isn't a human, or based off a human besides Pokemon.
In Episode 51, Billy returns, and Chuggaa buys him from Flimm.
Billy came with Chuggaa into the Pit of 100 Trials and came out to face off the Wrackles on Wracktail when Chuggaa was attacking the antenna.
He then disappeared a few seconds before Wracktail met his demise.