Wii-U's gpu is called Mario, and AMD named it that over 4 years ago.

[AnthonyW86]

Here's a little fun fact that most of you probably didn't know. Notice the codenames of the gpu's, and the fact that a HD4650 is very similiar to the gpu of the Wii-U:

 

Model	Launch	Code name	Fab (nm)	Transistors (Million)	Die Size (mm2)	Bus interface	Memory (MiB)	Clock rate	Config core1	Fillrate	Memory	GFLOPS (Single-precision)	TDP3 (W)	GFLOPS/W (Single-precision)	GFLOPS (Double-precision)	Features4 / Notes
Core (MHz)	Memory (MHz)	Pixel (GP/s)	Texture (GT/s)	Bandwidth (GB/s)	Bus type	Bus width (bit)
Radeon HD 4350	Sep 30, 2008	RV710 (luigi)	55	242	73	PCIe 2.0 x16 PCIe 2.0 x1 AGP 8x	256 512 1024	575	500	80:8:4	2.3	4.6	6.4	DDR2	64	92	20	4.6	No
Radeon HD 4550	Sep 30, 2008	RV710 (luigi)	55	242	73	PCIe 2.0 x16	256 512 1024	600 600	600 800	80:8:4	2.4	4.8	6.4 12.8	DDR2 GDDR3	64	96	25	3.84	No
Radeon HD 4650	Sep 10, 2008	RV730 PRO (mario)	55	514	146	PCIe 2.0 x16 AGP 8x	256 512 1024	650 600	900 500 700	320:32:8	4.8 5.2	19.2 20.8	16.0 22.4 28.8	DDR2 GDDR3 GDDR4	64 128	384 416	48	8.0 8.7	No
Radeon HD 4670	RV730 XT (mario)	55	514	146	PCIe 2.0 x16 AGP 8x	512 1024	750 750	1100 900 1000	320:32:8	6.0	24.0	28.8 32.0 35.2	DDR2 GDDR3 GDDR4	128	480	59	8.14	No
Radeon HD 4730	Jun 8, 2009	RV770 CE (wekiva)	55	956	256	PCIe 2.0 x16	512	700 750	900 900	640:32:8	5.6 6.0	22.4 24.0	28.8	GDDR3	128	896 960	110	8.15	179.2 192
Radeon HD 4770	Apr 28, 2009	RV740 (walden)	40	826	137	PCIe 2.0 x16	512	750	800	640:32:16	12	24	51.2	GDDR5	128	960	80	12	192
Radeon HD 4830	Oct 21, 2008	RV770 LE (wekiva)	55	956	256	PCIe 2.0 x16	512 1024	575	900	640:32:16	9.2	18.4	57.6	GDDR3 GDDR4	256	736	95	7.75	147.2
Radeon HD 4850	Jun 25, 2008	RV770 PRO (wekiva)	55	956	256	PCIe 2.0 x16	512 1024 2048	625	993	800:40:16	10	25	63.55	GDDR3 GDDR4	256	1000	110	9.09	200