With around a month to go until release Nintendo is stepping up its efforts with Mario Tennis: Ultra Smash, one of the Wii U's key Holiday releases. Following its brief appearance at E3 the title has been playable at a few expos and gaming events, and the latest trailer now shows us a slightly expanded cast.

In terms of new characters shown off we have Waluigi, Boo and Daisy. Boo was particularly popular - or not, depending on individual preferences - in the original Nintendo 64 title courtesy of his outrageous trick shots.

It's a pretty short video but you can see it below. Let us know what you think, and keep an eye out for a preview from us later this month.