You may recall that, a few months ago, Nintendo had announced that Super Smash Bros. Ultimate would be getting new Spirit Events beginning in January. In fact, a total of 4 had been confirmed. The first two events took place in January, followed by the third one in February. So, there is only one more left to go.
Well, the final spirit event has been announced. Beginning on March 22nd, spirits based on Princess Peach Showtime and Super Mario Bros. Wonder will arrive in Super Smash Bros. Ultimate. The event will last for 5 days. You can see the official announcement tweet about the matter down below.