I've seen exactly one actual crossover between 'The Gamer' and anything, that was one where he Han got good enough that he could lend people his power. Someone apparently bribed him into granting it to Naruto before he graduates the Academy for lulz. Its short so far and Han is camped out in Naruto's apartment playing advisor.
Barring that I've only seen a single quest on Spacebattles that gave the Gamer power to Minato from Sekerie and gave the option to be the reincarnation of Han, Krillan or the chosen option of Minato from Naruto. Everything else has been giving the ability t someone else. Strangely, no one seem have made Ranma the Gamer yet... maybe the actual min-maxing like Han only stupid high wisdom and relatively dump stating intelligence is too logical. That or I've got to actually sift through FF.net's archives as its been mislabeled.
Barring that I've only seen a single quest on Spacebattles that gave the Gamer power to Minato from Sekerie and gave the option to be the reincarnation of Han, Krillan or the chosen option of Minato from Naruto. Everything else has been giving the ability t someone else. Strangely, no one seem have made Ranma the Gamer yet... maybe the actual min-maxing like Han only stupid high wisdom and relatively dump stating intelligence is too logical. That or I've got to actually sift through FF.net's archives as its been mislabeled.