Batman: The Brave and the Bold focused on the lesser-known individuals that portrayed the heroes, such as Guy Gardner and Jay Garrick, rather than the more popular, better known Hal Jordan or Barry Allen, until Barry appeared in the second-season episode "Requiem for a Scarlet Speedster!" (though this episode centers around Kid Flash and Jay Garrick) while Hal appeared in the first-season episode "The Eyes of Despero!" as well as the third-season episode "The Scorn of Star Sapphire". In the episode "Bat-Mite Presents: Batman's Strangest Cases!", Batman even teamed up with Scooby-Doo and the Mystery, Inc. gang to defeat the Joker and the Penguin in a
Alter/Ego and load them into the engine. UTAU has also been experimented with. Plogue noted that the engine was designed to have user made vocal support from the beginning, though this was yet to be implemented due to a lack of support for this. As noted by BPB, Alter/Ego is praised for being a powerful tool by standards of free software. It, however, has a steep learning curve, though highlighted how easy it was to get the synthesizer to sing lyrics, calling the product "fun" to work with overall. Later in December that year, the software was awarded second place in