Added more Background Mixels (included @THE_SMBS_ON_SCRATCH's Mixels OCs) that aren't in the sprite archive + added more Background Mixel Placeholder Images. Credits: @IDoKookyStuff @Mixolix_Ellsworth17 @RockyGoldMixels @MRemixedNeoMix @THE_SMBS_ON_SCRATCH @The_Loudsnax @WDiamond_Studios @cartoonworld10 @A_MIXEL_ON_SCRATCH @MRetoldWorld @peyton_blue @UPATSFTrainz2004 @jammer06nt8 @NicolasCruz2004 LEGO, Cartoon Network, THOIP, BeansTheCat, Agustinantonio18 and PopCap.
