Aliasing level_difference → evolutionary_difference
Link to alias
Reason:
This is going over the loopholes caused by evolutionary stages in games like Pokemon. The level_difference tag was created, but it's only slightly more accurate than the age_difference tag. The problem with the level_difference tag is that Pokemon don't have to evolve, regardless of if they're leveled up. Pokemon like the first three Eeveelutions don't even evolve by leveling, they evolve by using items. Also, the evolutionary process can be stopped, so a 1st stage Pokemon could very well become level 100 without ever evolving. Most art doesn't give any indication of levels, so it's safer to go with something like this.
EDIT: The tag alias level_difference -> evolutionary_difference (forum #229941) has been rejected by @NotMeNotYou.
Updated by auto moderator