>>36867319You could do nothing with the manaphy egg or catch bonsly or munchlax in gen 3. However, you can catch and use meltan within a gen 7 game, therefore it is a gen 7 mon.
Moreover, its pokedex number comes before the starters. The only time that numbers before a generation's staters didn't belong to the generation before was victini, which couldn't be seen, caught or used until gen 5.
