diff --git a/pokesay.go b/pokesay.go
index 15b09ebf..c7b55bee 100644
--- a/pokesay.go
+++ b/pokesay.go
@@ -85,18 +85,6 @@ func parseFlags() pokesay.Args {
 	return args
 }
 
-func EntryFpath(idx int) string {
-	return pokedex.EntryFpath(CowDataRoot, idx)
-}
-
-func MetadataFpath(idx int) string {
-	return pokedex.MetadataFpath(MetadataRoot, idx)
-}
-
-func CategoryFpath(category string, fname string) string {
-	return pokedex.CategoryFpath(CategoryRoot, category, fname)
-}
-
 func runListCategories() {
 	categories := pokedex.ReadStructFromBytes[[]string](GOBCategoryKeys)
 	fmt.Printf("%s\n%d %s\n", strings.Join(categories, " "), len(categories), "total categories")
@@ -170,7 +158,7 @@ func runPrintRandom(args pokesay.Args) {
 	t := timer.NewTimer("runPrintRandom", true)
 	choice := pokesay.RandomInt(pokedex.ReadIntFromBytes(GOBTotal))
 	t.Mark("choose index")
-	metadata := pokedex.ReadMetadataFromEmbedded(GOBCowNames, MetadataFpath(choice))
+	metadata := pokedex.ReadMetadataFromEmbedded(GOBCowNames, pokedex.MetadataFpath(MetadataRoot, choice))
 	t.Mark("read metadata")
 
 	final := metadata.Entries[pokesay.RandomInt(len(metadata.Entries))]
diff --git a/src/bin/convert/png_convert.go b/src/bin/convert/png_convert.go
index 9e86909d..33f2cc58 100644
--- a/src/bin/convert/png_convert.go
+++ b/src/bin/convert/png_convert.go
@@ -4,19 +4,12 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"log"
 	"os"
 
 	"github.com/tmck-code/pokesay/src/bin"
 	"github.com/tmck-code/pokesay/src/pokedex"
 )
 
-func check(e error) {
-	if e != nil {
-		log.Fatal(e)
-	}
-}
-
 var (
 	DEBUG bool = false
 )
diff --git a/src/bin/pokedex/pokedex.go b/src/bin/pokedex/pokedex.go
index 139760de..c43d8bea 100644
--- a/src/bin/pokedex/pokedex.go
+++ b/src/bin/pokedex/pokedex.go
@@ -3,7 +3,6 @@ package main
 import (
 	"flag"
 	"fmt"
-	"log"
 	"os"
 	"path"
 	"strings"
@@ -12,12 +11,6 @@ import (
 	"github.com/tmck-code/pokesay/src/pokedex"
 )
 
-func check(e error) {
-	if e != nil {
-		log.Fatal(e)
-	}
-}
-
 // Strips the leading "./" from a path e.g. "./cows/ -> cows/"
 func normaliseRelativeDir(dirPath string) string {
 	return strings.TrimPrefix(dirPath, "./")
@@ -33,6 +26,20 @@ type PokedexArgs struct {
 	ToTotalFname      string
 }
 
+type PokedexPaths struct {
+	EntryDirPath    string
+	MetadataDirPath string
+	TotalFpath      string
+}
+
+func NewPokedexPaths(args PokedexArgs) PokedexPaths {
+	return PokedexPaths{
+		EntryDirPath:    path.Join(args.ToDir, args.ToDataSubDir),
+		MetadataDirPath: path.Join(args.ToDir, args.ToMetadataSubDir),
+		TotalFpath:      path.Join(args.ToDir, args.ToTotalFname),
+	}
+}
+
 func parseArgs() PokedexArgs {
 	fromDir := flag.String("from", "/tmp/cows", "from dir")
 	fromMetadataFname := flag.String("fromMetadata", "/tmp/cows/pokemon.json", "metadata file")
@@ -63,7 +70,7 @@ func parseArgs() PokedexArgs {
 func mkDirs(dirPaths []string) {
 	for _, dirPath := range dirPaths {
 		err := os.MkdirAll(dirPath, 0755)
-		check(err)
+		pokedex.Check(err)
 	}
 }
 
@@ -81,13 +88,10 @@ func mkDirs(dirPaths []string) {
 //   - contains the total number of pokemon files, used for random selection
 func main() {
 	args := parseArgs()
-
-	totalFpath := path.Join(args.ToDir, args.ToTotalFname)
-	entryDirPath := path.Join(args.ToDir, args.ToDataSubDir)
-	metadataDirPath := path.Join(args.ToDir, args.ToMetadataSubDir)
+	paths := NewPokedexPaths(args)
 
 	// ensure that the destination directories exist
-	mkDirs([]string{entryDirPath, metadataDirPath})
+	mkDirs([]string{paths.EntryDirPath, paths.MetadataDirPath})
 
 	// Find all the cowfiles
 	cowfileFpaths := pokedex.FindFiles(args.FromDir, ".cow", make([]string, 0))
@@ -102,7 +106,7 @@ func main() {
 		data, err := os.ReadFile(fpath)
 		pokedex.Check(err)
 
-		pokedex.WriteBytesToFile(data, pokedex.EntryFpath(entryDirPath, i), true)
+		pokedex.WriteBytesToFile(data, pokedex.EntryFpath(paths.EntryDirPath, i), true)
 		pbar.Add(1)
 	}
 
@@ -115,7 +119,7 @@ func main() {
 	pbar = bin.NewProgressBar(len(pokemonNames))
 	for key, name := range pokemonNames {
 		metadata := pokedex.CreateNameMetadata(i, key, name, args.FromDir, cowfileFpaths)
-		pokedex.WriteStructToFile(metadata, pokedex.MetadataFpath(metadataDirPath, i))
+		pokedex.WriteStructToFile(metadata, pokedex.MetadataFpath(paths.MetadataDirPath, i))
 		pokemonMetadata = append(pokemonMetadata, *metadata)
 		uniqueNames[name.Slug] = append(uniqueNames[name.Slug], i)
 		i++
@@ -130,12 +134,12 @@ func main() {
 	pokedex.WriteStructToFile(categories, "build/assets/category_keys.txt")
 
 	fmt.Println("- Writing total metadata to file")
-	pokedex.WriteIntToFile(len(pokemonMetadata), totalFpath)
+	pokedex.WriteIntToFile(len(pokemonMetadata), paths.TotalFpath)
 
 	fmt.Println("✓ Complete! Indexed", len(cowfileFpaths), "total cowfiles")
 	fmt.Println("wrote", i, "names to", "build/assets/names.txt")
 
-	fmt.Println("✓ Wrote gzipped metadata to", metadataDirPath)
-	fmt.Println("✓ Wrote gzipped cowfiles to", entryDirPath)
-	fmt.Println("✓ Wrote 'total' metadata to", totalFpath, len(pokemonMetadata))
+	fmt.Println("✓ Wrote gzipped metadata to", paths.MetadataDirPath)
+	fmt.Println("✓ Wrote gzipped cowfiles to", paths.EntryDirPath)
+	fmt.Println("✓ Wrote 'total' metadata to", paths.TotalFpath, len(pokemonMetadata))
 }
diff --git a/src/pokesay/lookup.go b/src/pokesay/lookup.go
index 75c39ecb..99bb4a8f 100644
--- a/src/pokesay/lookup.go
+++ b/src/pokesay/lookup.go
@@ -45,7 +45,7 @@ func ChooseByCategory(category string, categoryDir []fs.DirEntry, categoryFiles
 	categoryMetadata, err := categoryFiles.ReadFile(
 		pokedex.CategoryFpath(categoryRootDir, category, choice.Name()),
 	)
-	Check(err)
+	pokedex.Check(err)
 
 	parts := strings.Split(string(categoryMetadata), "/")
 
@@ -55,7 +55,7 @@ func ChooseByCategory(category string, categoryDir []fs.DirEntry, categoryFiles
 	)
 
 	entryIndex, err := strconv.Atoi(string(parts[1]))
-	Check(err)
+	pokedex.Check(err)
 
 	return metadata, metadata.Entries[entryIndex]
 }
diff --git a/src/pokesay/utils.go b/src/pokesay/utils.go
deleted file mode 100644
index 4e89f704..00000000
--- a/src/pokesay/utils.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package pokesay
-
-import "log"
-
-func Check(e error) {
-	if e != nil {
-		log.Fatal(e)
-	}
-}
diff --git a/test/pokedex_test.go b/test/pokedex_test.go
index 6a23a9b9..a988aeec 100644
--- a/test/pokedex_test.go
+++ b/test/pokedex_test.go
@@ -6,7 +6,6 @@ import (
 	"testing"
 
 	"github.com/tmck-code/pokesay/src/pokedex"
-	"github.com/tmck-code/pokesay/src/pokesay"
 )
 
 var (
@@ -32,7 +31,7 @@ func TestReadEntry(test *testing.T) {
 	result := pokedex.ReadPokemonCow(GOBCowData, "data/cows/1.cow")
 
 	expected, err := os.ReadFile("data/cows/egg.cow")
-	pokesay.Check(err)
+	pokedex.Check(err)
 
 	Assert(expected, result, test)
 }