Here's a very bright superhero outfit for 15" build a bear.
The pattern is for an all-in-one suit made from the feet up, with back fastening for an easy fit and a gap for the tail. A separate cape is fastened with buttons on the shoulders, then briefs or a skirt. Build a bears are the 'sitting down' type of bear which need a lot of shaping at the back for a good fit. However, I have given suggestions in blue text for other bears
I used a budget yarn Woolcraft New Fashion dk, in vibrant colours which gives a great effect.
Abbreviations: k: knit, p: purl, Ss: stocking stitch (one row knit, one row purl), kfb, knit into front loop of next st, then knit into back loop, pfb, purl into front loop of next st, then purl into back loop dc: decrease, beg: beginning, sts: stitches, tog: together, yr, yarn forward, yon: yarn on needle, m1: slip loop between sts onto left hand needle and knit into back, skk: slip next 2 sts onto right hand needle, insert left hand needle into front loops and knit together.
wrt k yf, sl st from left hand needle onto right hand needle, yb, sl st back onto left hand needle, turn
wrt p yb, sl st from left hand needle onto right hand needle, yf, sl st back onto left hand needle turn
If your bear isn't the 'sitting down' type you could omit rows 1 to 6, plus repeats of shaping, and work 8 rows of stocking stitch decreasing 1st at each end of knit rows to 92sts then continue with pattern
Rows begin at centre back
Sew back seam and fasten off ends
Using red yarn and duplicate stitch or cross stitch follow the chart for positioning of letter' Sew motif onto front of suit just under the neckline as shown in photo. finish with red stitching around the motif.