C'est le même tableau que pokémon
https://www.pokepedia.fr//Modification_des_statistiques
"Stat Totals
A Temtem’s Stat Total is the culmination of the three components mentioned above (Base, SV and TV). These are the actual numbers used in calculations during battle.
In battle, a Temtem’s offensive, defensive and speed stats may be raised or lowered as an effect of different techniques by up to 4 stages. This cannot be altered by switching out the affected Temtem.
Raised Stats – Gain an additional 50% of their initial value per stage, meaning they can be boosted by 50% / 100% / 150% / 200% when raised by 1 / 2 / 3 / 4 stages, respectively.
Lowered Stats – Are lowered by an increasing factor per stage. A lowered stat will become 67% / 50% / 40% / 33% of its initial value when lowered by 1 / 2 / 3 / 4 stages, respectively."
https://steamah.com/temtem-svs-tvs-base-stats-and-stat-totals-guide/