This is probably a Shitpost, but I'll answer seriously, anyway. Let's assume that each Lion is 175 kg (around the max weight of a large Male, so it'll likely be less). That's a total mass of 175,000,000,000 kg. The Sun is somewhere in the vicinity of 1,988,000,000,000,000,000,000,000,000,000 kg in terms of mass. In total, the Lions are approximately .0000000000000000000001% of the mass of the Sun. Now, let's assume that each Lion has it's own portable Atmosphere, that protects it from radiant heat (so they don't get Vapourised a few hundred thousand miles away). Upon contact, I predict the Lions to be completely atomised by the physical aspect of the Nuclear Fusion happening inside the Sun. Even on the surface, the sheer kinetic Energy produced by such a reaction is capable of completely destroying biological Matter. This isn't taking into account other minor details such as pressure and temperature. That quantity of Lions isn't even enough to begin to destabilise the Sun, and would be comparable to a large Human vs. a single Ant.