Justice League Heroes: The Flash Codes and Unlockables (GameBoy Advance)

Justice League Heroes : The Flash is a side-story which complements the main events during Justice League Heroes of the Playstation 2 console. It features The Flash (Wally West) as the playable character and another such as Superman,Wonder Woman, Martian Manhunter, Black Canary and Green Arrow as helpers. By the first level, Martian Manhunter warns Flash about a robot invasion in Keystone City, led by the Gorilla Grodd During the second level, Superman and Batman are investigating a break-in at S.T.A.R. Labs and Gotham City is being attacked both by regular criminals and robots. There, Flash confronts Killer Frost.

By the third level, the Martian asks Flash to help Themyscira, Wonder Woman's home island, where the sorceress Circe has taken over and turned all the guards into animals and he's joined by the Green Arrow. Circe slips that Brainiac is behind the plot, but doesn't give further details. At this time, the Martian Manhunter is with Superman at Mars, fighting the white martians and Flash talks with Batman. The Dark Knight informs about some floods across the Pacific and Flash goes to investigate. Once there, he finds and confronts the Professor Zoom.

Codes

Justice League codes
At the title screen enter these codes for cool effect. With each code hold B button down during entering. Flash yells if you do it right.

Up, down, left, right, right, left, down, up, select - All heroes

Up, down, up, up, down, down, up, down, select - All lives

Down, down, down, down, left, right, left, right, select - All powers

Up, up, down, down, left, right, left, right, select - Badguys are larger

Down, down, up, up, right, left, right, left, select - Badguys are smaller

Left, up, right, down, left, up, right, down, select - Flash is larger

Down, down, down, left, up, up, up, right, select - Flash is smaller

(Hold B) Up Down Left Right Right Left Down Up Select - Start with five Justice Icons

Unlockables

Extras Menu
Boss Rush - Beat the game

Making of... - Beat Circe

Superman Race - Beat the game

Theater - Beat Gorilla Grodd

Here's some gameplay footage from a pretty cool title: