The best replacement for splash is splat.

The best alternatives to splash are rated as following:
★★★★★  splat
★★★★★  splat rift
★★★  dash
★★★  v8 fusion
★★  hurricane harbor
★★  bamboo create
★★  capture
★  mountain creek
★  nissan march
★  bamboo capture
★  march
★  balm
★  mira quien salta
  agila
  opel agila
  create
  sirion

Your alternative for splash is not listed? Suggest!
Speaking about splash, one probably shouldn't forget about greg louganis.

Other search terms related to splash and their ratings are:
★★★★★ greg louganis
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splash
splat
splat rift