The SMAS SMB1 Koopa palette is located in a zip compression file.
Beach Koopas copyrights are Deviantart.
These graphics were custom made by KingGeoshiKoopshi64 from MFGG, but you only mentioned yourself in the Authors field. If you resubmit this, make sure you include both the original author and you, the ripper, in that field, as it's inconsiderate to disregard the original author for custom made graphics.
Your submission doesn't include the mandatory .palmask file.