Mario Kart 8 és Splatoon összevetés a japán piacon:

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| | Mario Kart 8 | Splatoon | Difference |
| | [WIU] (2014/05/29)| [WIU] (2015/05/28)| |
|----|---------|---------|---------|---------|--------------|
|Week| Weekly | LTD | Weekly | LTD | SPLTN - MK8 |
|----|---------|---------|---------|---------|--------------|
| 1 | 325.892| 325.892| 144.818| 144.818| -181.074|
| 2 | 73.051| 398.943| 68.913| 213.731| -185.212|
| 3 | 42.261| 441.205| 53.198| 266.929| -174.276|
| 4 | 28.112| 469.316| 43.653| 310.582| -158.734|
| 5 | 23.520| 492.837| 37.458| 348.040| -144.797|
| 6 | 19.386| 512.223| 34.135| 382.175| -130.048|
| 7 | 15.143| 527.366| 26.136| 408.312| -119.054|
| 8 | 14.992| 542.358| 22.557| 430.869| -111.489|
| 9 | 18.129| 560.487| 24.289| 455.158| -105.329|
| 10 | 18.067| 578.554| 28.256| 483.413| -95.141|
| 11 | 20.860| 599.414| 35.620| 519.034| -80.380|
| 12 | 28.221| 627.635| 41.361| 560.394| -67.241|
| 13 | 12.075| 639.710| 23.874| 584.268| -55.442|
| 14 | 11.148| 650.858| 23.403| 607.670| -43.188|
| 15 | 8.221| 659.079| 18.826| 626.497| -32.582|
| 16 | 6.839| 665.918| 17.490| 643.987| -21.931|
| 17 | 6.396| 672.313| 16.772| 660.759| -11.554|
| 18 | 5.936| 678.250| 20.736| 681.495| 3.245|
| 19 | 4.517| 682.767| 14.958| 696.454| 13.687|
| 20 | 3.996| 686.763| 13.186| 709.639| 22.876|
| 21 | 3.625| 690.387| 14.680| 724.319| 33.932|
| 22 | 2.821| 693.208| 13.159| 737.478| 44.270|
| 23 | 3.170| 696.378| 11.969| 749.477| 53.099|
| 24 | 3.210| 699.588| | | |
| 25 | 13.544| 713.132| | | |
| 26 | 8.752| 721.884| | | |
| 27 | 12.742| 734.626| | | |
| 28 | 19.244| 753.870| | | |
| 29 | 24.938| 778.808| | | |
| 30 | 34.331| 813.139| | | |
| 31 | 38.637| 851.776| | | |
| 32 | 28.403| 880.180| | | |
|----|---------|---------|---------|---------|--------------|
|Total -|1.126.412| -| 749.477| -376.935|
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A Slime draws near! Command?