#703 - Free Museum Trip

In Pokémon Ruby/Sapphire and its remakes, if the player lacks the $50 fee for the Oceanic Museum, they will enter for free, as the reception believes that the player is part of Team Magma or Team Aqua. This only works before the evil team leaves, though.

SOURCE: https://bulbapedia.bulbagarden.net/wiki/Oceanic_Museum#Trivia