I received an email today from Toonami UK explaining why they skipped episode 33. This was after Voicebox gave their explanation for the missing episode. It seems that Hasbro decided not to produce the episode. Also there is news on when they plan to air the rest of Energon in the UK. Here’s the email

Hello

Episode 33 was skipped because Hasbro, the company who distribute the show
decided to keep episode 33 back for the new series which will launch on Toonami
in March 2005.
The current series that Toonami are showing runs from episode 27-39, with the
exception of 33. They are on everyday at 4pm.

Thank you for your email,

Toonami.

It is unclear whether Hasbro will move episode 33 to fit in later in the series or just leave it out all together.