Team Rocket is the 5th Pokemon TCG expansion of the Base Set series featuring Dark Pokemon
Even though Nightchaser is a target, it seems like you'll mostly be using Retroactive as a substitute, so there won't be many opportunities to use this for that purpose
However, the situation at CGC is different
C Common Thousand Energy X SPELL Increase the original ATK and DEF of all face-up Level 2 Normal Monsters (except Tokens) on your side of the field by 1000 points until the End Phase
With Link Monsters not being able to exist in Defense Position and requiring it to be face-up for the arrows on the card to be visible, you can understand exactly what kind of ruling nightmares would be caused if you flip a Link Monster into face-down Attack Position and as a result, the card was errata'd
A Loss Of Identity For those who wish Learn had returned in MTG Avatar, like Jhoald, the issue here is largely one of expectations