You may say 'raion.'
raion
Japenese-Gijeigo Barjeh/English it is Lion Barrage or Lion combo
マウンテンライオン Mauntenraion
'Guardian lion' may be translated as守護の獅子 (shugo no shishi) in Japanese.
You may say 'shiroi raion,' written: 白いライオン
You may say 'kuroi raion,' written: 黒いライオン
A liger is a cross between a lion and tiger that is only bred in captivity. The Japanese word for liger is Raiga.
You may say 'raion,' or 'shishi.' Written respectively, they are: ライオン  獅子
yowawetod.
The Kanji for Flame (炎) can be pronounced either "Honō"or "En", and the word for Lion(s) is "Shishi" based on several translation sites. Therefore the two most likely ways to say "Flame Lion" in Japanese is "Shishi no Honō", which is most literally "Lion of Flame(s)" or "Enshishi" which literally means "Flame-Lion"
You could say 'doumou na raion,' written: 獰猛なライオン
Shishi
Haruhiko Jō was the voice actor for Scar in the Japanese version of The Lion King.