Pokemon.com has released its quarterly ban list for Battle Styles. While no changes have been made to the Standard or Expanded formats, a rule change has been announced for all previous prints of Energy Recycler so they match the Battle Styles print.
All previous versions of Energy Recycler (XY—Ancient Origins, 72/98; Sun & Moon—Guardians Rising, 123/145; and Sun & Moon—Forbidden Light, 143/131) will receive errata to be updated with the following card text:
Shuffle up to 5 basic Energy cards from your discard pile into your deck.
The latest version of Energy Recycler from Sword & Shield—Battle Styles has different text than older versions. Previous versions forced the player to shuffle 5 basic Energy cards into their deck if there were at least 5 in the discard pile, but the new text allows the player to choose up to 5 instead. (As a reminder, that means any number from 1 to 5.)