Use APKPure App
Get Snoomoji stickers for WhatsApp - WAStickerApps old version APK for Android
Adesivi Snoomoji per WhatsApp Messenger
Snooomojis...
Three stickers packs are available including the SNOO characters.
How to Use:-
1. Install and open the app
2. Tap on the sticker pack you want to install then tap on the "ADD TO WHATSAPP" button
3. Enjoy!
This app is open source: https://github.com/Naveen3Singh/Stickers
Give it a ★★★★★ if you like it!