Dogo and Goigoi the R32

Dogo
Dogo(3444) is an R32 based out of East New York Yard and is special because he's coupled with 3777(Goigoi) rather than 3445(which is now coupled to 3468). Originally Dogo was coupled with 3468 until the train was sent out of service due to graffiti being sprayed on the left side.

Goigoi
Goigoi(3777) is an R32 based out of East New York Yard and is special like the rest of the mixed R32's because he's coupled with Dogo(3444) rather than 3778.

Zach v.s 3444/3777
In the 11th Vlog, Zach explained why he hated Dogo and Goigoi(3444 and 3777) because the train tricked him to thinking that 3468 was back in service, plus the Dogo(who was leading) was throwing Zach around, making him trip and fall like how Penelope(1472) and Terra(5884) did. What set off Zach even more was how 3468 was coupled with a new set; 3445, thus making it hard to find her since he's used to automatically seeing 3444 and knowing that 3468 is coupled with it.

Trivia

 * Similar to "The Lion Guard Crew" both Dogo and Goigoi got there names from The Lion Guard.
 * Dogo(3444) used to be coupled with 3468 before she was vandalized.