Pokémon Red and Blue Versions/Development/As Red, Green, and Blue/No Mew Present

According to the interview by Satoru Iwata with Tsunekazu Ishihara and Shigeki Morimoto about the release of, localized as Iwata Asks, they admitted that after the tools were removed, they added  in the remaining space on the. Nintendo thought that this would have been risky because altering the internal data after completing the testing period meant that any new and/or es created by adding data without referring to debugging tools would have been much harder to fix. Standard practices usually discourage altering the  and not testing it just before releasing the  to the customer.