Each of Kimat's evolution have their own requirement that is different. The easiest part of them is that each evolution requires Kimat to be above level 150 which he already crossed. The next steps are the only thing that Kimat needs in order to evolve.
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Evolution Requirements for Lightning Cat
1. Achieve level 150
2. Gather Five Lightning Crystals (0/5)
3. Feed the Five Lightning Crystals to Kimat (0/5)
4. Kill Enemies that have the Lightning Element that is +/- 5 levels from Kimat (0/10)
Description: A peculiar monster that is said to have been an upgraded version of an elemental cat that now has its pure element covering its body. Despite being a cat, it is two meters long and one meter in height. It is said to gave been a descendant of a tiger due to how big it is.